Fix warp filter test with --disable-ssse3

Put the test cases for av1_warp_affine_ssse3 behind a
"#if HAVE_SSSE3" condition

BUG=aomedia:582

Change-Id: Ide55dc1cf6a1d1b0c37db6d17488ac3f8e113888
diff --git a/test/warp_filter_test.cc b/test/warp_filter_test.cc
index 2e4e6c3..0353c07 100644
--- a/test/warp_filter_test.cc
+++ b/test/warp_filter_test.cc
@@ -28,9 +28,11 @@
     SSE2, AV1WarpFilterTest,
     libaom_test::AV1WarpFilter::BuildParams(av1_warp_affine_sse2));
 
+#if HAVE_SSSE3
 INSTANTIATE_TEST_CASE_P(
     SSSE3, AV1WarpFilterTest,
     libaom_test::AV1WarpFilter::BuildParams(av1_warp_affine_ssse3));
+#endif
 
 #if CONFIG_HIGHBITDEPTH && HAVE_SSSE3
 TEST_P(AV1HighbdWarpFilterTest, CheckOutput) {